Named tuple
A named tuple is a tuple-like record whose fields are accessible by descriptive names as well as positional indexes.
Python How-To
A named tuple is an immutable tuple-like data structure whose elements can be accessed by descriptive field names as well as by position.
- How it is used
- Provides a lightweight, mostly read-only model for task data without writing a custom class.
- How deep it goes
- Works through creation, named-field access, and record parsing; raises updating an immutable instance as a challenge.
- Examples
- Uses task records with title, description, and urgency, plus latitude-and-longitude return values.
- What you can do after
- Build it from scratch with collections.namedtuple and use named fields to read parsed task records.
Tiny Python Projects: Learn coding and testing with puzzles and games
A typed named tuple is an immutable tuple-like record whose fields have names and declared types.
- How it is used
- Models explicit, carefully controlled program state in an interactive Tic-Tac-Toe game.
- How deep it goes
- Defines construction, indexing, named access, immutability, typed fields, defaults, and _replace(), but not implementation internals.
- Examples
- Uses cell-and-player records, a full Tic-Tac-Toe state, default initialization, invalid fields, and immutable turn updates.
- What you can do after
- Apply typed named tuples to represent state, update them with _replace(), and check type misuse with mypy.
.NET in Action, Second Edition
A named tuple is a C# tuple whose elements have programmer-defined names in addition to positional access.
- How it is used
- Carries font names alongside FiggleFont objects for filtering and sorting an HTTP response.
- How deep it goes
- Defines named and unnamed tuple elements and shows a typed LINQ projection, without exploring tuple internals.
- Examples
- Uses an AllFonts collection pairing reflected property names with FiggleFont objects.
- What you can do after
- Apply it via C# named tuples to carry related values through a LINQ query without declaring a new type.
Read how .NET in Action, Second Edition explains named tuple →
Related concepts
- tuplekind of · A tuple is a finite, ordered collection of elements treated as a single composite value or record.
- collectionuses · A collection is a data structure or abstraction that groups multiple elements for storage, access, traversal, or processing.
- data modelkind of · A data model is a structured representation of data that defines its entities, attributes, relationships, and applicable constraints.
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